This unit is for all ages and abilities. The HeartSine(R) samaritan PAD 350P defibrillator is compact and easy to use, as well as being semi-automatic. It is easily portable as it is the lightest defibrillator on the market. Two button operation with step-by-step guidance makes it easy to use. Has a combined battery and electrodes as well as one expiration date to follow, monitor and replace.